PDF malware analysis — malicious · 731c22e647ad2f0c

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 13:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 1878392dee4806bd562a60c463dcd22b SHA-1: 61dfb30c1f5cc1949f22ec56ee57f8dae4f9dc05 SHA-256: 731c22e647ad2f0ca3e78fb573572bdfd7384a2be9cef3ceba6e986b10626917

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirectors and further malicious PDFs, masquerading as game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests a multi-stage attack designed to lure users into downloading further malware. The document body and embedded links indicate a phishing attempt for game-related cheats.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://netcdn.tw/app/431946152/roblox-hack-client-game-hack In PDF document text
- http://amtabor2.at/images/coin-master-free_GM406889139.pdfIn PDF document text
- http://amtabor2.at/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- http://amtabor2.at/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- http://amtabor2.at/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://amtabor2.at/images/free-roblox-hack_GM431946152.pdfIn PDF document text
- http://amtabor2.at/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
- http://amtabor2.at/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
- http://amtabor2.at/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- http://amtabor2.at/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
- http://amtabor2.at/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.roblox.com/.IIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000028d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x28D9	22284 bytes
SHA-256: `5a937380dac573ccecac7c4488ce2ee989357f760f24150730be2581723dbd3d`
`font_01_sfnt_off00005a36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A36	18592 bytes
SHA-256: `9b1a4ebf879a07bf8de669c3d2a62a283ca76e3a96f19070a05b062fb78a4c3a`

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